MB15A02 Fujitsu Microelectronics, MB15A02 Datasheet - Page 6

• Manufacturer Part Number: MB15A02
• Description: Low Power Serial Input PLL Synthesizer With 1.1ghz Prescaler
• Manufacturer: Fujitsu Microelectronics

6
7-BIT SWALLOW COUNTER DIVIDE RATIO
11-BIT PROGRAMMABLE COUNTER DIVIDE RATIO
PULSE SWALLOW FUNCTION
f
N:
A:
f
R:
P:
MB15A02
VCO
OSC
NOTE: Divide ratio: 0 to 127
NOTES: Divide ratio less than 16 is prohibited.
f
VCO
C
Divide
Divide
Ratio
Ratio
2047
127
:Output frequency of external voltage controlled oscillator (VCO)
:Output frequency of the external reference frequency oscillator
16
17
N
A
Preset divide ratio of binary 11-bit programmable counter (16 to 2,047)
Preset divide ratio of binary 7-bit swallow counter (0 A 127, A<N)
Preset divide ratio of binary 14-bit programmable reference counter (6 to16,383)
Preset modulus of external dual modulus prescaler (64 or 128)
0
1
= [(PxN)+A] xf
S
1
Divide ratio: 16 to 2,047
S1 to S7: Swallow counter divide ratio setting bit. (0 to 127)
S8 to S18: Programmable counter divide ratio setting bit.
C: Control bit (sets at low level).
Data input with MSB first.
18
S
2
S
7
0
0
1
S
0
0
1
Divide ratio of swallow
Control bit
LSB
17
S
S
S
3
6
0
0
1
0
0
1
OSC
setting bit
counter
16
S
4
S
5
0
0
1
S
0
0
1
R
15
S
S
S
5
4
0
0
1
0
0
1
14
S
S
S
6
3
0
0
1
0
0
1
13
S
S
S
7
2
0
0
1
0
0
1
Direction of data shift
12
S
S
S
8
1
0
1
1
1
1
1
11
S
S
9
0
0
1
10
10
S
S
0
0
1
Divide ratio of programmable
11
S
S
9
0
0
1
12
S
S
8
0
1
1
setting bit
counter
13
S
14
S
15
S
16
S
MSB
17
S
18
S